Yorick is Princess Tulsa's husband and the father of Maw Tucket. He has only appeared on the elder starfish's scroll in "Rule of Dumb."
He is orange. He has light green eyes with black pupils. He wears a jester's outfit.
He most likely was a jester for the Royal Family of Bikini Bottom. It was doing this that he fell in love with Princess Tulsa, the king and queen's daughter.
Since marriage with a princess wouldn't be allowed, so it could be that she ran away with him and was disowned which could explain her tattered clothes.
The two had a daughter who would be known as, "Maw Tucket".
At some point, Maw Tucket and/or Yorick and Princess Tulsa moved into Bikini Bottom. Maw Tucket would eventually meet Billy Bob Star, member of one of the oldest, if not the oldest family of the area.
He appears twice on a family tree in the episode, "Rule of Dumb".